Retaining tool with rotational locating device

ABSTRACT

A retaining tool with rotational locating device includes a main frame and a locator. The main frame provides a first lock part at an end thereof. The locator rotationally inserts through the main frame next to the other end thereof. The locator further includes an adjustable unit and a locking unit attached to the adjustable unit. The locking unit has a second lock part at the lower section thereof corresponding to the first lock part. The lock parts engage with an object and the locking unit with the second lock part is capable of moving vertically in case of the adjustable unit being turned horizontally. The object is forced to keep contact other objects tightly or to release from contacting other objects.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention is related to a retaining tool with rotational locating device and particularly to a rotational locating device capable of fixing a heat sink to a central processing unit (CPU).

2. Brief Description of the Related Art

Due to electronic product such as computer being popularly used and being widely applied to any fields, the electronic technology industry develops rapidly toward high speed operation and high data storage capacity and it results in high heat during the electronic parts running under high speed.

Taking the host unit of a computer as an example, most heat therein is generated from the CPU and the heat staying in the CPU exceeding the allowable value leads to shut down of the computer. Further, in order to solve problem relating to electromagnetic wave radiation, the host unit is enclosed with a casing. Under this circumference, how to release the heat from the CPU and other heat generating components as fast as possible becomes an important subject has to be cared.

Usually, heat dissipation of the CPU is done with a heat sink with a plurality of cooling fins being disposed at a side thereof and another side thereof contacting the CPU. In this way, the heat generated by the CPU is able to transmit to the cooling fin end and the heat is capable of moving outward via radiation or a fan, which is added to the heat sink. Thus, it is necessary for the CPU keeping contact with heat sink tightly, otherwise, it is easy to become heat resistance increase and degrade effect of heat dissipation largely. The conventional fixing device for the CPU being joined to the heat sink shown in FIGS. 1 and 2 provides a locking part 1 and the locking part has a locking bar 11 with an end thereof extending downward a vertical part 110. The lower end of the vertical part 110 has a through hole 111 capable of engaging a jut (not shown) at a lateral side of a joining seat H bearing a CPU C. Another end of the locking bar 11 has slots 112 for being inserted with a hanging part 12. The hanging part 12 with a fitting hole 121 is pivotally jointed to a handle O with an eccentric hole O1 by way of a pivot S passing through the fitting hole 121 and the eccentric hole O1. When the handle O is turned with respect to the pivot S, the hanging part 12 moves vertically to secure a heat sink R to the CPU C via a through hole 122 engaging another jut H1 at the other side of the joining seat H.

However, the locking part 1 forcing the heat sink R to approach and contact the CPU C by means of an eccentric device or cam producing a restriction force has the following deficiencies:

1. The handle O has a low dead point such that it is not easy to press the locking part 1 firmly.

2. Due to insufficient binding force being created by the dead point, it is easy to result in lock failure or loosening in case of dropping down and occurring shock.

3. The handle O easily becomes tilt after the locking part 1 being in a state of engaging.

4. Undesirable contact is formed between the heat sink R and the CPU C to increase thermal resistance to decrease effect of heat removal.

SUMMARY OF THE INVENTION

In order to solve the preceding problems, an object of the present invention is to provide a retaining tool with rotational locating device with which tight contact between the heat sink and the CPU is capable of reaching to decrease the thermal resistance and enhancing the binding force to the heat sink and the CPU significantly.

Another object of the present invention is to provide a retaining tool with rotational locating device in which a locator rotates and is located by means of a guiding groove with a preset specific path to increase the binding force to the CPU and the heat sink greatly.

A further object of the present invention is to provide a retaining tool with rotational locating device with which the binding force to the CPU and the heat sink intersects the locking force of the locator so as to avoid locking failure or loosening in case of dropping down and occurring shock.

Accordingly, a retaining tool with rotational locating device according to the present invention provides includes a main frame and a locator. The main frame provides a lock part at an end thereof. The locator rotationally inserts through the main frame next to the other end thereof. The locator further includes an adjustable unit and a locking unit attached to the adjustable unit. The locking unit has a lock part at the lower section thereof corresponding to the first lock part. The lock parts engage with an object and the locking unit with the second lock part is capable of moving vertically in case of the adjustable unit being turned horizontally. The object is forced to keep contact other objects tightly or to release from contacting other objects easily.

BRIEF DESCRIPTION OF THE DRAWINGS

The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:

FIG. 1 is an exploded perspective view of a conventional fixing device for a heat sink illustrating the fixing device being detached from the heat sink;

FIG. 2 is an assembled perspective view of the conventional fixing device shown in FIG. 1 illustrating the fixing device being attached to the heat sink;

FIG. 3 is an exploded perspective view of the first embodiment of a retaining tool with rotational locating device according to the present invention in operation;

FIG. 4 is an assembled perspective view of the first embodiment of a retaining tool with rotational locating device according to the present invention shown in FIG. 3;

FIG. 5 is a perspective view illustrating the first embodiment of a retaining tool with rotational locating device according to the present invention being ready for fixing to the heat sink;

FIG. 6 is a perspective view illustrating first embodiment of a retaining tool with rotational locating device according to the present invention fixing to the heat sink;

FIG. 7 is an exploded perspective view of the second embodiment of a retaining tool with rotational locating device according to the present invention;

FIG. 8 is an assembled perspective view of the first embodiment of a retaining tool with rotational locating device according to the present invention shown in FIG. 7;

FIG. 9 is an exploded perspective view of the third embodiment of a retaining tool with rotational locating device according to the present invention;

FIG. 10 is an assembled perspective view of the third embodiment of a retaining tool with rotational locating device according to the present invention shown in FIG. 9;

FIG. 11 is an exploded perspective view of the fourth embodiment of a retaining tool with rotational locating device according to the present invention;

FIG. 12 is an assembled perspective view of the third embodiment of a retaining tool with rotational locating device according to the present invention shown in FIG. 11;

FIG. 13 is an exploded perspective view of the fifth embodiment of a retaining tool with rotational locating device according to the present invention;

FIG. 14 is an assembled perspective view of the third embodiment of a retaining tool with rotational locating device according to the present invention shown in FIG. 13;

FIG. 15 is an exploded perspective view of the sixth embodiment of a retaining tool with rotational locating device according to the present invention;

FIG. 16 is an assembled perspective view of the third embodiment of a retaining tool with rotational locating device according to the present invention shown in FIG. 15;

FIG. 17 is a perspective view illustrating a feasible structure of the lock unit in the retaining tool with rotational locating device according to the present invention; and

FIG. 18 is perspective view illustrating a feasible structure of the guide groove in the adjustable unit of the retaining tool with rotational locating device according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 3, 4, 5 and 6, the first embodiment of a retaining tool with rotational locating device according to the present invention provides a retaining tool 2, which includes a main frame 21 and a locator 22.

The main frame 21 is inserted with the locator 22. The main frame 21 has a lock part 210 at an end thereof for fixedly attaching with a jut 41 protruding outward from a lateral side of a joining seat 4, which bears a CPU (central processing unit 3). The main frame 21 extends from a lateral side of a heat sink 5 to another side of the heat sink 5 so as to allow the heat sink 5 touching the CPU 3 tightly for guiding heat of the CPU 3 out via the heat sink 5. The locator 22 is inserted into another end of the main frame 21.

The locator 22 has a lock part 220 to engage with another jut 41 at another lateral side of the joining seat 4 opposite to the lock part 210 and the lock part 220 is driven with the locator 22 to force the heat sink 5 keeping contact with the CPU 3 tightly. Under this circumstance, not only thermal resistance between the heat sink 5 and the CPU 3 decreases greatly but also it constitutes the exertion direction of force of the locator 22 intersecting with engaging force exerted to the CPU 3 and the heat sink 5 so as to promote engagement between the related parts such as the CPU 3, the joining seat 4 and the heat sink 5. In short, the lock part 220 is forced to join the preceding parts together tightly due to rotationally adjusting the locator 22 such that it is capable of avoiding undesirable locking failure or loosening resulting from the preceding parts dropping down and occurring shock.

The locator 22 is feasibly implemented to be composed of an adjustable unit 221 and a locking unit 222. Alternatively, the adjustable unit 221 is made integrally with the locking unit 222. The adjustable unit 221 provides a guide groove 2210 and extends outward a handle 2221 for being turned by a user. The main frame 21 is elongated and provides at least an opening 211 at the other end opposite to the end joining the lock part 210 for the locking unit 222 inserting through the opening 211 to couple with the adjustable unit 221. That is, the main member 21 fits with the locator 22 by means of the opening 211.

Besides, at least a holding arm 212 with an elongated hole 2120 is disposed next to the opening 211 for being passed through with a spindle 23 and the spindle 23 further inserts into the guide groove 2210 of the adjustable unit 221 and a through hole at the upper end of the locking unit 222. Hence, when the adjustable unit 221 is turned, the spindle 23 is capable of moving upward or downward in accordance with the profile of the guide groove 2210 arranged in the adjustable unit 221 so as to move the lock part 220 of the locking unit 222 for tightening or loosening engagement of the preceding parts such as the CPU 3, the joining seat 4 and the heat sink 5. Further, when the lock part 220 is turned to the bent lowest end of the guide groove 2210 contacting the spindle 23, a function of locating can be obtained and the engagement is in a state of extreme tightness such that it is capable of avoiding undesirable locking failure or loosening resulting from the preceding parts dropping down and occurring shock.

Referring to FIGS. 7 and 8, the second embodiment of a retaining tool with rotational locating device according to the present invention is illustrated. The difference of the present embodiment from the first embodiment is in that the retaining tool 2 provides an elastic member 24 between the main frame 21 and the locking unit 222 and the elastic member 24 has a shape of bow, character “C” or an inverted character “C” or any other suitable shape with a hole at the top thereof for being passed through by the locking unit 222. The elastic member 24 biases the locking unit 222 and the main frame respectively for increasing stability of the locking unit 222 and avoiding the locking unit shaking resulting from vibration. Further, the elastic member 24 is helpful for the locking unit 222 engaging with the jut 41 of the joining seat 4.

Referring to FIGS. 9 and 10, the third embodiment of a retaining tool with rotational locating device according to the present invention is illustrated. The difference of the present embodiment from the second embodiment is in that the elastic member 24 extends a clip part 240 to catch the locking unit 222 for increasing binding force of the elastic member 24 with the locking unit 222.

Referring to FIGS. 11 and 12, the fourth embodiment of a retaining tool with rotational locating device according to the present invention is illustrated. The difference of the present embodiment from the first embodiment is in that the holding arm 212 at least has a projection 2121 to keep contact with the guiding groove 2210 instead of the elongated hole being passed through with the spindle 23. Once the locator 22 is turned, the adjustable unit 221 is capable of moving downward or upward in addition of rotating so that the locking unit 222 is able to perform the job of engagement and disengagement.

Referring to FIGS. 13 and 14, the fifth embodiment of a retaining tool with rotational locating device according to the present invention is illustrated. The difference of the present embodiment from the second embodiment is in that the holding arm 212 at least has a projection 2121 to keep contact with the guiding groove 2210 instead of the elongated hole being passed through with the spindle 23. Once the locator 22 is turned, the adjustable unit 221 is capable of moving downward or upward in addition of rotating so that the locking unit 222 is able to perform the job of engagement and disengagement.

Referring to FIGS. 15 and 16, the sixth embodiment of a retaining tool with rotational locating device according to the present invention is illustrated. The difference of the present embodiment from the second embodiment is in that the holding arm 212 at least has a projection 2121 to keep contact with the guiding groove 2210 instead of the elongated hole being passed through with the spindle 23. Once the locator 22 is turned, the adjustable unit 221 is capable of moving downward or upward in addition of rotating so that the locking unit 222 is able to perform the job of engagement and disengagement.

Furthermore, referring to FIG. 17, the locking unit 222 of the preceding embodiments provides a reinforcing part 2220 at the top of the lock part to strengthen the locking unit 222. FIG. 18 shows the guiding groove 2210 of the adjustable unit 221 is arranged with a continuous up and down curve and has a slight indentation at the lowest end to provide a function of locating so as to force the joining seat 4, the CPU 3 and the heat sink 5 fixedly attached to each other tightly.

While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims. 

1. A retaining tool with rotational locating device, comprising: a main frame with two ends, providing a first lock part at one of the ends; and a locator, rotationally inserting through the main frame next to the other one of the ends and further comprising an adjustable unit and a locking unit attached to the adjustable unit, the locking unit having a second lock part at the lower section thereof corresponding to the first lock part; wherein, the lock parts engage with an object and the locking unit with the second lock part is capable of moving vertically in case of the adjustable unit being turned horizontally; whereby, the object is forced to keep contact other objects tightly or to release from contacting other objects.
 2. The retaining tool with rotational locating device as defined in claim 1, wherein the adjustable unit is made integrally with the locking unit.
 3. The retaining tool with rotational locating device as defined in claim 1, wherein the adjustable unit has a guiding groove surrounding the outer side thereof.
 4. The retaining tool with rotational locating device as defined in claim 1, wherein the adjustable extends outward an elongated handle at the top thereof.
 5. The retaining tool with rotational locating device as defined in claim 3, wherein the guiding groove forms a continuous up and down curve.
 6. The retaining tool with rotational locating device as defined in claim 3, wherein the locator fits with an elastic member.
 7. The retaining tool with rotational locating device as defined in claim 3, wherein the main frame is provided with a shape of elongated bar.
 8. The retaining tool with rotational locating device as defined in claim 1, wherein the main frame is provided with at least a locating hole.
 9. The retaining tool with rotational locating device as defined in claim 8, wherein the locating hole is passed through with the locking unit to join the adjustable unit.
 10. The retaining tool with rotational locating device as defined in claim 9, wherein at least a holding arm with a fitting hole is disposed next to the locating hole and a spindle passes through the fitting hole.
 11. The retaining tool with rotational locating device as defined in claim 10, wherein the spindle inserts into the guiding groove.
 12. The retaining tool with rotational locating device as defined in claim 1, wherein the elastic member is disposed between the locking unit and the main frame.
 13. The retaining tool with rotational locating device as defined in claim 12, wherein the elastic member extends outward a clip part to increase binding force to the elastic member and the locking unit.
 14. The retaining tool with rotational locating device as defined in claim 9, wherein at least a holding arm with a projection is disposed next to the locating hole.
 15. The retaining tool with rotational locating device as defined in claim 14, wherein the projection keeps contact with the guiding groove.
 16. The retaining tool with rotational locating device as defined in claim 15, wherein an elastic member is disposed between the locking unit and the main frame.
 17. The retaining tool with rotational locating device as defined in claim 16, wherein the elastic member extends outward a clip part to increase binding force of the elastic member and the locking unit. 